As Gai Amatsu attempts to set up his new company Thouser-Intellion with the help of his new Humagear secretary Rin, he suddenly falls ill. Kuroto Dan has been revived by the Ark and infected Gai with game disease. Can Gai overcome his infection to stop Kurouto's plans?

With Rin's life at stake and Thouser at the mercy of Genm's infection, it seems nothing can stop Kuroto Dan. No one, save perhaps... the return of his father, Masamune Dan!